[ Vocabulary and Tenses ]
they … for an hour before the doctor came
A. had been waiting
B. waited

Random Topics:
Tenses and ArticleZero Conditional SentencePrefixes SuffixesPast Tense and NeutralGrammar of Future PlansModal Verbs of PermissionUncountable NounsVerb & GrammarTime ClausePassive Voice Present SimpleOther quiz:
Tenses › ViewWe _______ English every week
A. are study
B. study
C. is studying
D. studies
Grammar › View
…. get up at 5 o’clock on Sunday. It’s not necessary.
A. don’t have to
B. mustn’t
C. shouldn’t
Mixed Conditionals › ViewIf I was a good cook,
A. I will invite you to lunch.
B. I would invited you to lunch.
C. I’ll have invited you to lunch.
D. I’d have invited them to lunch.
Grammar › View
My grandfather is very old. So, _____ lives with ______.
A. him …… we
B. he …… us
C. I …… our
D. she …… them
